EP2527772B1 - Appareil de chauffage - Google Patents

Appareil de chauffage Download PDF

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Publication number
EP2527772B1
EP2527772B1 EP11250727.2A EP11250727A EP2527772B1 EP 2527772 B1 EP2527772 B1 EP 2527772B1 EP 11250727 A EP11250727 A EP 11250727A EP 2527772 B1 EP2527772 B1 EP 2527772B1
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EP
European Patent Office
Prior art keywords
gas
combustion
blast furnace
air
pipeline
Prior art date
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Active
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EP11250727.2A
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German (de)
English (en)
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EP2527772A1 (fr
Inventor
Andrew Cameron
Kelly Teresa Visconti
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Linde GmbH
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Linde GmbH
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Filing date
Publication date
Priority claimed from US13/115,184 external-priority patent/US9151492B2/en
Application filed by Linde GmbH filed Critical Linde GmbH
Priority to RS20180109A priority Critical patent/RS56817B1/sr
Priority to PL11250727T priority patent/PL2527772T3/pl
Publication of EP2527772A1 publication Critical patent/EP2527772A1/fr
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Publication of EP2527772B1 publication Critical patent/EP2527772B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/005—Shaft or like vertical or substantially vertical furnaces wherein no smelting of the charge occurs, e.g. calcining or sintering furnaces
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/04—Brick hot-blast stoves with combustion shaft
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/14—Preheating the combustion air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/04—Regulating fuel supply conjointly with air supply and with draught
    • F23N1/045—Regulating fuel supply conjointly with air supply and with draught using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • F23N3/02—Regulating draught by direct pressure operation of single valves or dampers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F27B1/04—Combinations or arrangements of shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C2300/00—Process aspects
    • C21C2300/06—Modeling of the process, e.g. for control purposes; CII
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to apparatus for heating a blast furnace stove having a combustion region and a combustion gas outlet associated with the combustion region.
  • Blast furnaces are primarily but not exclusively used for the reduction of iron oxide ore to molten iron.
  • the purpose of blast furnace stoves is to provide the blast furnace with a consistent hot-blast temperature, at a desired flow rate, in a safe and environmentally responsible manner over a protracted period of many years.
  • the operation of a blast furnace stove is in principle simple.
  • An air-fuel burner is typically used to burn a fuel gas (typically, predominantly blast furnace gas) and the combustion products are passed through a large mass of refractory brick that captures the sensible heat of the combustion product. Once the refractory bricks have reached the desired operating temperature the burner is shut down and cold air is passed through stove, passing over the bricks, so as to be preheated before being sent to the blast furnace as the hot-blast air.
  • the stoves are operated in banks of three or four so that some stoves are being heated while others are providing hot blast to the blast furnace.
  • the blast furnace stoves may have any of a number of different configurations.
  • each stove comprises a first vertical chamber in which combustion takes place along side a second vertical chamber in which the refractory bricks are located.
  • Such a stove is often referred to as being of the external combustion chamber kind.
  • Stoves in which the combustion region is housed in the refractory chamber are also known. These are called “internal" combustion stoves.
  • the combustion chamber is placed on top of the refractory chamber, typically being located within a dome-shaped structure.
  • US 2 598 735 discloses a plant comprising an assembly of several stoves associated to a blast furnace wherein combustion gas extracted from said stoves is recirculated via a gas generator prior to being fed to the blast furnace.
  • Blast furnace top-gas (often referred to as blast furnace gas) is conventionally the primary fuel used to heat the blast furnace stoves, but the use of this fuel has the drawback that its calorific value is variable, being strongly dependent upon the blast furnace operating practices.
  • the variability of the blast furnace gas' calorific value is such that it is well known to blend the blast furnace gas with a higher calorific value fuel gas such as coke oven gas, converter gas or natural gas, in order to boost its heating value and generate the required flame temperature.
  • fuel gas such as coke oven gas, converter gas or natural gas
  • this relatively hot flue gas is routed to a waste heat recovery unit where a portion of its sensible heat content is capture and used to perform the preheating.
  • Another alternative method of heating the blast furnace stoves is to enrich the combustion air with oxygen. Adding oxygen to replace part of the combustion air increases the flame temperature as, at constant total molecular oxygen flow, the nitrogen ballast in the combustion products is reduced. Commonly, oxygen enrichment of the air is used to facilitate a reduction in the amount of coke oven, converter or natural gas needed to generate the desired flame temperature.
  • blast furnace stoves It is desirable to improve the operation of blast furnace stoves but in a flexible manner that is able to take account of changes in the availability and cost of fuel and other gases during an operating campaign.
  • apparatus for heating a blast furnace stove having a combustion region and a combustion gas outlet associated with the combustion region comprising:
  • combustion gas is meant to include the gaseous product of combustion.
  • the apparatus according to the invention is capable of operation in a plurality of different modes, according to the second, third and fifth pipelines that are selected for communication with the combustion region.
  • the most important of these modes is one in which the oxidant comprising at least 85% by volume of oxygen is a sole oxidant used to support combustion and combustion gas is recirculated to the combustion region via the fifth pipeline.
  • a number of advantages can be obtained by operating in this mode. First, desired flame temperatures can be achieved simply by using blast furnace gas as the fuel gas without enrichment with a higher calorific gas such as coke oven gas or natural gas. Second, recycle of the combustion gas makes possible a net reduction in the rate at which carbon dioxide is evolved. Third, advantages analogous to those obtained from the oxygen-enrichment of air (see above) can be obtained.
  • the apparatus according to the invention may be operated with recovery of heat from the combustion gas by passing said gas through a heat recovery heat exchanger.
  • the recirculation of combustion gas to the combustion region dilutes the mixture of fuel and oxidant therein and hence modifies the temperature and reducing the risk of damage to the materials of the stove as a result of the combustion.
  • the combustion may in fact be flameless.
  • the apparatus according to the invention gives the operator of the blast furnace the flexibility to switch to conventional operation employing air to support combustion and raising the calorific value of a blast furnace fuel by employing in addition to the blast furnace fuel a higher calorific value fuel such as coke oven gas, converter gas or natural gas.
  • the apparatus according to the invention may therefore include a source of higher calorific value fuel and a sixth pipeline operable to distribute the higher calorific value fuel to the combustion region.
  • low(er) calorific value fuel is meant to include a fuel which typically has a calorific value of 9MJ/Nm 3 or less.
  • blast furnace gas is the lower calorific value fuel that is typically used.
  • high(er) calorific value gas indicates a gas which typically has a calorific value in excess of 9MJ/Nm 3 .
  • Coke oven gas, converter gas or natural gas is a suitable higher calorific value fuel for use in the apparatus according to the invention.
  • the means for selectively introducing oxidant from the third pipeline into the second pipeline offers the operator of the blast furnace the option of operating the stove with oxygen-enriched air.
  • the apparatus according to the invention desirably includes a vent pipe for combustion gas, typically terminating in a stack, which vent pipe typically communicates with the fourth pipeline.
  • a vent pipe for combustion gas typically terminating in a stack
  • vent pipe typically communicates with the fourth pipeline.
  • the source of the lower calorific value fuel gas is typically a blast furnace with which the blast furnace stove forming part of the apparatus according to the invention is associated.
  • the source of air is typically at least one compressor, blower or fan.
  • the compressor is typically separate from the compressor or compressors that supply the air blast to the blast furnace.
  • the source of oxidant comprising at least 85% by volume of oxygen is typically an air separation plant.
  • the oxidant may therefore comprise at least 95% by volume of oxygen.
  • the air separation plant may, for example, separate air by fractional distillation or by pressure swing adsorption.
  • Each of the first to sixth pipelines may include a valve or series of valves which when open gives the desired flow and when closed prevents that flow.
  • the valves may all be associated with a common control apparatus, which if desired may operate automatically and which may be programmable.
  • Each of the first to the sixth pipelines may also include transmitters, safety valves and other control devices which aid the overall operation of the apparatus.
  • the fourth and fifth pipelines may both communicate with means for treating the combustion gas.
  • the treatment of the combustion gas may comprise recovery of waste heat from it, or recompression, or both.
  • the apparatus according to the invention may therefore comprise a heat exchanger for recovering waste heat from the combustion gas, and a blower or compressor for passing combustion gas from the fourth pipeline to the fifth.
  • FIG. 1 there is shown schematically an arrangement of a blast furnace 120 and three stoves 100 in an iron works.
  • the operation of the blast furnace 120 produces molten iron by reduction of iron oxide with carbon provided by materials such as coke.
  • the reduction of the iron oxide ore to iron causes the formation of carbon monoxide and a gas mixture comprising carbon monoxide, carbon dioxide and nitrogen flows from the top of the blast furnace 120 to a fuel supply control device 110 which controls the supply of the blast furnace top gas to each one of three blast furnace stoves 100.
  • Each stove 100 has a chamber for the combustion of the top gas from the blast furnace 120 and a chamber for heating an air blast.
  • the air blast is supplied via an air supply control device 130.
  • the chamber for heating of the air blast comprises refractory material in the form of ceramic bricks or the like, often referred to as checker work. Combustion gases from the combustion chamber of each stove 100 flow through the air heating chamber and give up heat to the refractory bricks.
  • each stove is operated in accordance with a predetermined cycle such that at any point in time at least one of the stoves is being used to heat the air blast and the rest of the stoves are being heated by combustion of the blast furnace gas.
  • the stoves 100 When the refractory bricks are being heated, the resultant combustion or flue gases are fed to a flue gas disposal device 150.
  • the purpose of the stoves 100 is to provide the blast furnace 120 with a consistent hot-blast temperature, at a desired blow rate over a protracted period of many years. It is well known in the art to control the combustion so as to obtain a consistent stove performance, to reduce energy consumption and to promote both safe operation and an extended campaign life.
  • the combustion chamber of each stove 100 is provided with a burner to effect the combustion.
  • the refractory bricks capture the sensible heat of the combustion product. Once the checker bricks have reached the operating temperature, the burner is shut down and cold air is passed over the refractory bricks where it is preheated before being sent to the blast furnace as "hot blast" air.
  • the stoves are operating in banks of 3 or 4 so that some stoves are being heated while others are providing hot blasts to the blast furnace.
  • FIG. 2 shows a conventional Cowper stove 100 having an external combustion chamber 101, refractory material 102 and a dome 103.
  • the stove is operated so as to ensure that the temperature of the dome 103 does not become so high that damage is caused to the stove 100. It is to be understood that there are also stoves with internal combustion chambers, and that the apparatus according to the present invention is equally applicable to the operation of such stoves.
  • blast furnace top gas is fed to a burner 108 via a fuel inlet 105 and oxidant to the burner 108 via an oxidant inlet 104.
  • the resulting hot combustion gases flow upwards through the chamber 101 and pass through the dome 103 and down through the chamber lined with the refractory bricks 102. As a result, the refractory bricks 102 are heated.
  • the resulting combustion gases exit the stove 100 through a port 106.
  • the temperature of the exiting combustion gases is conventionally about 200° - 350°C.
  • the blast air typically has a temperature of 1100 - 1200°C.
  • the top gas is preferably taken from a blast furnace to which blast air is provided from the stove 100. This allows for the arrangement for the stoves 100 near the blast furnace 120, is energy efficient and helps to make it possible to reduce total emissions from the plant.
  • the blast furnace top gas typically has a calorific value of about 3.2MJ/Nm 3 . If desired, an alternative low calorific value fuel may be used instead.
  • the blast furnace gas is supplemented with a fuel gas of higher calorific value.
  • a fuel gas of higher calorific value typically coke oven gas is used for this purpose, but other gases such as converter gas or natural gas can be used instead.
  • the amount of higher calorific value gas that is used is less than that necessary to raise the calorific value of the blast furnace gas to 9MJ/Nm 3 .
  • the relatively hot flue gas from the stoves which typically has a temperature between 250° and 450°C, is passed to a waste heat recovery unit where a portion of its sensible heat content is captured and used to preheat the fuel gas prior to combustion by the stove burners.
  • an oxidant containing at least 85% by volume of oxygen (typically at least 95% by volume of oxygen) is used to replace part of the combustion air.
  • This replacement has the effect of increasing the flame temperature as, at constant total oxygen flow, nitrogen ballast in the combustion products is reduced.
  • a higher flame temperature can be exploited to reduce the amount of higher calorific value gas that needs to be added in order to generate the desired flame temperature.
  • the desired flame temperature can be maintained at reduced flow rate of higher calorific value gas by virtue of the oxygen enrichment, the energy input to the stoves tends to be reduced. In practice, this is remedied by increasing the flow of blast furnace gas to the stove burner. The higher mass flow rate of blast furnace gas compensates for the reduced air mass flow. As a result, convective heat transfer conditions within the stoves are not seriously effected.
  • the use of the higher calorific value gas may be eliminated altogether by employing an oxidant comprising at least 85% oxygen instead of air and causing combustion gases to be recirculated into the combustion region of the stove.
  • the recirculated combustion gases dilute the mixture of fuel and oxidant sufficiently for the combustion not to cause damage to the materials of the stoves.
  • the combustion may if desired be flameless.
  • about one third of the combustion gases generated in the stoves is so recirculated.
  • a "synthetic air" comprising recirculated combustion gases and oxidant containing at least 85% by volume of oxygen may form a gas mixture which, in comparison with air, has a relatively high concentration of oxygen.
  • those parts of the necessary gas pipeline for handling such a gas mixture may be formed of materials such as copper or other materials which are safe for the use with oxygen.
  • some of the oxygen may be introduced into the combustion chamber via one or more lances.
  • Blast furnaces are conventionally operated continuously for a period of several years. During the period of such an operating campaign, the cost and availability of the various feeds to the blast furnace and to the blast furnace stoves may vary. Accordingly, although it is believed by us that operation with recirculation of combustion gases is generally desirable, an operator of a blast furnace may require a certain flexibility in the way in which the blast furnace stoves are operated.
  • the heating apparatus embodiment according to the invention provides this flexibility.
  • An example of this apparatus is shown in Figure 3 .
  • Various one-way valves, flow control valves and the like are omitted from Figure 3 so as to facilitate an understanding of the inventive embodiment.
  • the apparatus comprises a main air pipeline 310, a main low calorific value fuel (blast furnace gas) pipeline 320, a main high calorific value fuel (coke oven gas) pipeline 330, a main combustion gas pipeline 340, a main oxygen pipeline 350 and a main recycle gas pipeline 360.
  • the pipelines are associated with gas headers or distributors (not shown) which afford appropriate communication between the various pipelines and the inlets and outlets to the stoves, these inlets and outlets being essentially similar to those of the stove shown in Figure 2 .
  • the main air inlet pipeline 310 receives air from a compressor 309 and communicates with the respective inlet ports of the stoves 302, 304 ,306 and 308 via distribution pipes 312, 314, 316 and 318, respectively.
  • Blast furnace gas is distributed from the main blast furnace gas pipeline 320 to the stoves 302, 304, 306 and 308 via blast furnace gas distribution pipes 322, 324, 326 and 328, respectively.
  • coke oven gas or other high calorific value fuel may be distributed to the stoves 302, 304, 306 and 308 via coke oven distribution pipes 332, 334, 336 and 338, respectively.
  • Combustion gases flow out of the stoves 302, 304, 306 and 308 through combustion gas distribution pipes 342, 344, 346 and 348 respectively, all of which communicate with the main combustion pipeline 340.
  • the pipeline 340 terminates in a recycle gas blower 370 and extends through an operational waste heat recovery unit 380. Intermediate a waste heat recovery unit 380 and the recycle gas blower 370 there is a vent pipeline 390 which leads waste gas to a stack (not shown) for discharge to the atmosphere.
  • the outlet of the blower 370 communicates with the combustion gas recirculation pipeline 360.
  • the recirculation gas pipeline 360 is connected to each of the air distribution pipes 312, 314, 316 and 318.
  • the main oxygen pipeline 350 can supply oxygen produced in air separation plant 351 to each of the distribution pipes 312, 314, 316 and 318. Alternatively or additionally, it can supply the oxygen directly to the stoves 302, 304, 306 and 308 via oxygen distribution pipes 352, 354, 356, 358 respectively.
  • a by-pass pipe may be used allowing the combustion gases of the pipeline 340 to by-pass the waste heat recovery unit 380.
  • the waste heat recovery unit 380 is typically arranged to transfer heat from the combustion gas to thegas air fed to the blast furnace.
  • the apparatus shown in Figure 3 is capable of being operated in a plurality of different modes, which have been described above. These modes include:
  • Example (f) above is essentially similar to example (e) but without total replacement of the combustion air with oxygen and recirculated combustion gas, the combustion air only being partially replaced with these gases.
  • the source of oxygen is preferably an air separation plant producing oxygen of at least 95% purity and typically at least 99.9% purity.
  • an array of on/off valves is provided.
  • valves can be opened and closed in order to operate the illustrated apparatus in any one of the modes according to examples (a) - (f) above so as to heat the stoves.
  • the necessary valve positions are provided in Table 1 one below. Typically, only one (or possibly two) of the stoves is heated at any one time.
  • oxygen may optionally be lanced directly into the stoves 302, 304, 306, 308, in which case valves 353, 355, 357 and 359 are opened.
  • the apparatus may be operated in modes other than (a) - (f) described above.
  • waste heat recovery may be employed in all modes, not just in (b) and (c).
  • a particular advantage of operating in mode (d) is that a rate at which nitrogen molecules enter the stoves is less than in other of the modes, thereby resulting in reduced formation of oxides of nitrogen. Even when the apparatus shown in Figure 3 is operated with a recycle, there should be no need to subject the combustion gas to chemical treatment to remove oxides of nitrogen.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Incineration Of Waste (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Air Supply (AREA)

Claims (6)

  1. Appareil destiné à chauffer un four de haut-fourneau ayant une région de combustion (101) et une sortie de gaz de combustion (106) associée à la région de combustion (101), l'appareil comprenant :
    a) une source de combustible de plus faible valeur calorifique ;
    b) une première conduite (320) utilisable pour distribuer le combustible de plus faible valeur calorifique depuis la source de celui-ci jusqu'à la région de combustion ;
    c) une source d'air ;
    d) une deuxième conduite (310) utilisable pour distribuer l'air depuis la source de celui-ci jusqu'à la région de combustion ;
    e) une source d'oxydant (351) comprenant au moins 85 % en volume d'oxygène ;
    f) une troisième conduite (350) utilisable pour distribuer l'oxydant depuis la source de celui-ci jusqu'à la région de combustion ;
    g) une quatrième conduite (340) utilisable pour conduire le gaz de combustion depuis la sortie de gaz de combustion loin du four ; et
    h) une cinquième conduite (360) utilisable pour faire retourner une partie du gaz de combustion à la région de combustion,
    l'appareil comprenant en outre un moyen (393) pour introduire sélectivement l'oxydant depuis la troisième conduite (350) dans la deuxième conduite (310).
  2. Appareil de la revendication 1, comprenant en outre un tuyau de ventilation (390) en communication avec la quatrième conduite (340).
  3. Appareil selon l'une quelconque des revendications précédentes, dans lequel la source de combustible de plus faible valeur calorifique est un haut-fourneau avec lequel ledit four de haut-fourneau est associé.
  4. Appareil selon l'une quelconque des revendications précédentes, dans lequel la source d'air est au moins un compresseur (309).
  5. Appareil selon l'une quelconque des revendications précédentes, comprenant en outre une source de combustible de plus forte valeur calorifique et une sixième conduite (330) utilisable pour mettre la source de combustible de plus forte valeur calorifique en communication avec la région de combustion.
  6. Appareil selon la revendication 5, dans lequel chacune des première à sixième conduites comprend une vanne utilisable pour fournir sélectivement une communication souhaitée ou empêcher la communication du combustible de plus forte valeur calorifique.
EP11250727.2A 2011-05-25 2011-08-15 Appareil de chauffage Active EP2527772B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RS20180109A RS56817B1 (sr) 2011-05-25 2011-08-15 Uređaj za zagrevanje
PL11250727T PL2527772T3 (pl) 2011-05-25 2011-08-15 Urządzenie grzejne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/115,184 US9151492B2 (en) 2011-02-22 2011-05-25 Heating apparatus

Publications (2)

Publication Number Publication Date
EP2527772A1 EP2527772A1 (fr) 2012-11-28
EP2527772B1 true EP2527772B1 (fr) 2017-11-15

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Country Status (11)

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EP (1) EP2527772B1 (fr)
JP (1) JP6203998B2 (fr)
KR (1) KR101868155B1 (fr)
CN (1) CN102796836A (fr)
AU (1) AU2012202664B2 (fr)
BR (1) BR102012012678B1 (fr)
ES (1) ES2657244T3 (fr)
HU (1) HUE038117T2 (fr)
PL (1) PL2527772T3 (fr)
RS (1) RS56817B1 (fr)
UA (1) UA109419C2 (fr)

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CN114249548B (zh) * 2021-12-15 2022-11-08 广西柳州钢铁集团有限公司 燃气双膛窑稳定掺配燃料方法

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HUE038117T2 (hu) 2018-09-28
AU2012202664A1 (en) 2012-12-13
BR102012012678A2 (pt) 2013-07-30
CN102796836A (zh) 2012-11-28
UA109419C2 (xx) 2015-08-25
RU2012121568A (ru) 2013-11-27
EP2527772A1 (fr) 2012-11-28
ES2657244T3 (es) 2018-03-02
JP6203998B2 (ja) 2017-09-27
JP2012246568A (ja) 2012-12-13
BR102012012678B1 (pt) 2018-11-27
AU2012202664B2 (en) 2014-09-04
KR101868155B1 (ko) 2018-06-15
RS56817B1 (sr) 2018-04-30
PL2527772T3 (pl) 2018-04-30
KR20120132373A (ko) 2012-12-05

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